Use the iOS ABI when running SIMARM on Mac or targeting iOS.

runtime/vm/disassembler_arm.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/disassembler.h"
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_ARM.
 #if defined(TARGET_ARCH_ARM)
 
 #include "platform/assert.h"
@@ skipping 94 matching lines @@
 // Print the condition guarding the instruction.
 void ARMDecoder::PrintCondition(Instr* instr) {
   Print(cond_names[instr->ConditionField()]);
 }
 
 
 // These register names are defined in a way to match the native disassembler
 // formatting, except for register alias pp (r5).
 // See for example the command "objdump -d <binary file>".
 static const char* reg_names[kNumberOfCpuRegisters] = {
+#if defined(TARGET_OS_MACOS)
+  "r0", "r1", "r2", "r3", "r4", "pp", "r6", "fp",
+  "r8", "r9", "r10", "r11", "ip", "sp", "lr", "pc",
+#else
   "r0", "r1", "r2", "r3", "r4", "pp", "r6", "r7",
   "r8", "r9", "r10", "fp", "ip", "sp", "lr", "pc",
+#endif
 };
 
 
 // Print the register name according to the active name converter.
 void ARMDecoder::PrintRegister(int reg) {
   ASSERT(0 <= reg);
   ASSERT(reg < kNumberOfCpuRegisters);
   Print(reg_names[reg]);
 }
 
@@ skipping 1404 matching lines @@
   int32_t instruction_bits = Instr::At(pc)->InstructionBits();
   OS::SNPrint(hex_buffer, hex_size, "%08x", instruction_bits);
   if (out_instr_size) {
     *out_instr_size = Instr::kInstrSize;
   }
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM